Libero Cross-Site Scripting Vulnerability - Security Advisory - SOS-09-001
 
Release Date.   23-Feb-2009
Vendor Notification Date. 20-Oct-2008
Product.   Libero
Platform.   Windows (verified), possibly others
Affected versions.  Libero v5.3 SP5 (verified), possibly others
Severity Rating.  Medium
Impact.    Cookie/credential theft, impersonation, loss of confidentiality
Attack Vector.   Remote
Solution Status.  Vendor patch not yet available
CVE reference.   CVE-2009-0540
 
Details.
Libero is a library management system. During an application penetration test Sense of Security identified a cross-site scripting vulnerability in the search feature of the Libero web application. This occurred as a result of the application not properly filtering HTML tags which allowed malicious Javascript to be embedded. When input is incorrectly validated and not properly sanitised and then displayed in a web page, attackers can trick users into viewing the web page and causing malicious code to be executed. 
 
Proof of Concept.
You can test the susceptibility of your system to this issue by entering the following string into the search term form field and clicking 'search'.
<script>alert(document.cookie)</script>
A vulnerable site will return the users' session ID.
 
Solution.
The vendor has advised that the fix will be made available in Libero v5.5 SP1. 
A fix will not be made available for previous versions.
 
Discovered by.
Oliver Greiter from SOS Labs.
 
About us.
Sense of Security is a leading provider of IT security and risk management solutions. Our team has expert skills in assessment and assurance, strategy and architecture, and deployment through to ongoing management. We are Australia's premier application security consultancy and trusted IT security advisor to many of the countries largest organisations.

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